The way you reference an image depends on where the image was found.

If the image was found in a book, journal article or entry in a database:

Do not cite the image individually but give the citation details for the book/article/etc. Treat it as though it was a direct quote.

If the image was found online, as part of a website, treat it like a Web Object:

Author AA, Author BB. Title of page or object. Clarifying information if necessary. Title of web site. Published Month DD, YYYY or Updated Month DD, YYYY. Accessed Month, DD, YYYY. URL.

Examples:

1. UCF Libraries. Research lifecycle and University of Central FL. Infographic. University of Central Florida. Updated June 23, 2017. Accessed January 11, 2020. https://library.ucf.edu/wp-content/uploads/sites/5/2017/06/research-life-cycle.png
2. California Deparment of Public Health. West Nile Virus transmission cycle. 2018. Image reproduced in: Vector-borne diseases. California Office of Environmental Health Hazard Assessment. Updloaded February 11, 2019. Accessed January 11, 2020. https://oehha.ca.gov/epic/impacts-biological-systems/vector-borne-diseases
3. Slide 37 - Solvent, nummular eczema. Image. Centres for Disease Control and Prevention. Updated April 17, 2001. Accessed September 3, 2020. https://www.cdc.gov/niosh/topics/skin/occderm-slides/ocderm8.html

Notes:

• If there is a credit for the image, use this as your author.  If there is no credit for the image, use the authors of the web site if you believe they are responsible for the image.
• If the "authors" of the site and the name of the site are identical, treat the page as if it has no author and begin with the title of the page (for example, the Center for Disease Control and Prevention is both the name of the site and the name of the organisation responsible for the information on that site).
• If you are not sure who is responsible for the image, omit the authors and begin with the title of the image.
• If the image does not have a title, give a description of the image (e.g.: Photograph of a boy holding a fish).
• If the image was not created by the authors of the book/article/website/etc, then it needs to be treated as a secondary citation (give as much of a full citation for the image as you can, then state the role it plays in your source material, and give the full citation for your source - see example 2).